(10 points) 1. A company makes two products named Regular and Deluxe from two ingredients A and B. Let: XA number of pounds of ingredient A used in Regular products each year XB = number of pounds of ingredient B used in Regular products each year YA number of pounds of ingredient A used in Deluxe products each year YB = number of pounds of ingredient B used in Deluxe products each year Write constraints for the following situations: (3 pts.) a) You must use at least 20,000 pounds of ingredient B each year. (3 pts.) b) The total amount of ingredient B used (in both products) cannot exceed the total amount of ingredient A used (in both products). (4 pts.) c) At least one-third of the amount of ingredient B used each year must be for Deluxe products.